chore: [jenkins-controller] Bump Jenkins test version in dockerfiles/... (#579)

... Dockerfile

Made with ❤️️ by updatecli

Co-authored-by: GitHub Actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

dockerfiles/Dockerfile

@@ -7,7 +7,7 @@ ARG JENKINS_VERSION=2.473-jdk17
 FROM jenkins/jenkins:${JENKINS_VERSION}
 
 # Define a specific Jenkins test version for testing purposes.
-ARG JENKINS_TEST_VERSION=2.474-rc35263.dd24b_6b_a_3b_0c
+ARG JENKINS_TEST_VERSION=2.475-rc35284.fdc46ed187c8
 # Make the Jenkins test version available as an environment variable.
 ENV JENKINS_TEST_VERSION=$JENKINS_TEST_VERSION